Refactor VersionedUnspentOutput / Inputs

### Is your feature request related to a problem?

Currently the structs `VersionedUnspentOutput` contains the unspent output and the protocol version:
```elixir
%VersionedUnspentOutput{
protocol_version: v,
unspent_output: %UnspentOutput{]}
}
```
But this is makes the code more complex to write and understand

### Describe the solution you'd like

It could be more easy to keep the `UnspentOutput` struct and add the protocol version in it directly.

### Additional context

_No response_

### Epic

_No response_

Start by locating the VersionedUnspentOutput, UnspentOutput, and corresponding input struct definitions and all their usages. Trace how the protocol version is read and passed through the code, then update the affected callers consistently; the refactor is complete when the separate versioned wrappers are no longer needed and the existing behavior remains intact.

Written by the indexing model from the issue text.